Food preparer



Jan. 10, 1939. E. F. MARTQINET 2,143,202

F0015 PREPARER Original Filed Oct. 6, 1933 2 Sheets-Sheet l Eu ye/zeEA/ani/zel Jan. 10, 1939. I F. MARTINET 2,143,202

FOOD PREPAHER Original Filed Oct. 6, 1953 2 Shets-Sheet 2 Ill-mm? 59 m mmwmm Patented Jan. 10, 1939 PATENT" OFFICE 2,143,202 FOOD PREPAREB.

- Eugene F. Martinet, Cleveland, Ohio, assignor to The P. A. Geier Company, Cleveland, Ohio, a

' corporation of Ohio Original application October s, 1933, Serial No.

392,483. Divided and this application October 13, 1936, Serial No. 105,373

6 Claims. (Cl. 146-192) The invention relates to food preparing devices or. appliances for grinding, chopping or pureeing foods and foodstuffs, and more particularly to a food grinding device of a type having the operating mechanism housed in a base, a food receiving bowl mounted on the base, and the food grinding elements detachably mounted above the bowl and detachably connected with the operating mechanism through a central tubular sleeve with which the bowl is provided; and this application is a division of my copending application Serial No. 692,483, entiled Food preparers, filed October 6, 1933 which became Patent No. 2,063,- 692 on December 8, 1936.

Prior food preparers of this type have either been limited in use for one purpose only, or have given rise to difliculties so numerous as to render them impractical. 1*

It is therefore an object of the present invention to provide an improved food grinding device which overcomes the difficulties encountered with prior devices of this type, in which the food grinding elements are mounted for quick operative attachment or detachment above the bowl in 23 the same manner as numerous other food preparing elements, without the use of bolts, screws", or other special fastening and mounting means such as adapters, supports, connectors, reduction gears and the like. 1

Another object is to provide an improved food grinding device in which all the oil and grease for lubricating the driving mechanism is at all' times kept below the food receiving bowl, so as to render it impossible for oil or grease to drop 85 into or become mixed with-food therein.

A further objectis to provide an improved food grinding device which has a very low center'of gravity located either within or below the food receiving bowl thereof, so that the device is not top-heavy. and will not'tip over during use.

- A still further object is to provide an improved food grinding device which is rigid, compact and simplified in construction 'andin which a multiple speed motoris utilized for driving the grinding elements at proper speeds, which motor is adapted for driving various other food preparing elementsat proper speeds for carrying out theirrespective operations.

It is likewise an object of the present invention to provide an improved food grinding device in which there are no cavities, crevices, pockets and the like, where food particles may accidentally enter or collect torender the device unsanitary or affect the operation of the driving or driven parts or mechanism thereof.

.receive the driven parts of the grinder mechanism; and

throughout the drawings.

integral casting which includes the gear case porwhich is shown in Fig. 2, from which switch suit These and other objects may be attained by the parts, elements, apparatus, devices, arrangements and combinations, preferred embodiments of which are shown in the drawings, and are hereinafter described in detail and claimed, which 6 may be stated in general terms as including a food grinding device having a base housing provided with a sleeve projecting upwardly from and through the base, a multiple speed motor mounted within the base housing and operatively 0 connected to a drive shaft journaled in said sleeve, 9. food receiving bowl having acentral tubular sleeve journaled on said housing sleeve, and a food grinder detachably mounted on the upper end ofssaid housing sleeve and having a 15 detachable clutch engagement with said drive shaft.

In the drawings- Figure l is a vertical sectional view of the improved food grinding device in operative position; 20

Fig. 2 is a perspective view thereof on a reduced scale;

Fig. 3 is a fragmentary expanded view of the food grinding elements and the upper portions of the bowl sleeve and drive shaft in position to 2! Fig. i is a fragmentary sectional view taken on line 4-4, Fig. 1.

Similar numerals refer to similar parts St The improved food grinding device is indicated generally at 20 and includes a base 2|, preferably provided with rubber feet 22 for supporting the improved device upon a table or other 3| convenient place of. use. -A housing indicated generally at 23 is connected to the base by screws 24, and the housing 23 preferably comprises an tion 25, the motor housing portion 23 and 4| sleeve member 21. The member 21 projects ver-', tically upward from the gear ease portion 23' through an aperture 28 in the base 2|. V V v The motorhousing portion 26 has a motor end) cap 29 attached thereto, and a-multiple speed a motor is mounted within the motor housing and cap 23-23, the motor shaft 33 thereof being provided with worm threads 3|. i The food grinding device 23 is providedwith suitable wiring 32, having a usual plug (not 5| shown) for being attached to any suitable source of electric power; and the wiring 32 may lead to a control switch, the operating member 33 of able wires 34 may lead to the motor within the! bears on a split anti-friction thrust ring 54 inmotor housing 26-29. The motor and switch constructions are of a usual type and therefore are not illustrated in detail.

Oilless bearings 35 and 36 are mounted within and adjacent to the extremities of sleeve 21, and a worm gear shaft 31 is journaled in said bearings 35 and 36, the upper end 31a of shaft 31 projecting upward beyond the end of the sleeve 21, and the lower end 31b of said shaft projecting into the gear case portion 25 of the integral housing 23.

A preferably linen micarta worm gear 38 meshes with the worm 3| and is provided with a hub 39 and mounted by a pin 48 on the lower end 31b of the worm gear shaft 31.

The lower end 311) of the shaft 31 is also provided with an axial recess 4| in which is located a ball bearing 42 thatds'held in position by peening over the edge of the recess after the ball has been inserted therein. Amadjusting screw 43 located directly below the balk-.42 and axially ofthe shaft 31, is provided with a l iock nut 44 and is threaded through the removable gear case cover 45; and the screw 43 provides means for receiving the downward axial thrust of the shaft 31 and foradjustably locating the shaft 31 in the proper position.

The gear case 25 may be filled with grease and since the bearings 35 and 36 are oilless bearings, all grease and lubricant for the motivating parts of the improved food grinder are located below the top of and within the base 2|.

By providing the integral housing 23, which includes in one piece the gear case 25, the motor case 26 and the sleeve 21, the parts thus far described may be readily machined and assembled in their proper and correct relation without play between parts; and great rigidity is imparted to the motivating parts of the device. Moreover, the bearings 35 and 36 in both being rigidly mounted in the sleeve 21, may be readily located in axial alignment so that the shaft 31 driven by the motor will always run true on center.

The upper end 310. of the shaft 31 may be also provided with an axial recess in which is located a ball bearing 41 for providing a thrust abutment with certain food preparing elements, if it is desired to remove the grinder elements and attach otherfood processing elements.

A food receiving bowl 48 having an outer anscoped over the sleeve 21 as best shown in'Fig. 1.

The bowl 48 is also provided with a downwardly extending collar 52, which is substantially in continuation of its central sleeve and the collar 52 is .ioumaled about the external circum-' ferential bearing portion 53 of the sleeve 21. while the lower end of the collar 52 preferably terposed between the collar 52 and the annular step 55 of the sleeve 21.

The sleeve 21 is also provided with an external annular upper bearing surface 59 spaced from the bearing portion 53 and above the base 2|, and journaled in the bowl sleeve 5| which is telescoped. thereover and removably rotatably mounted thereon.

The food receiving bowl 48 is preferably provided with a. series of radial ribs or cars 68 extending inward from the curved bottom wall 58 toward the collar 52 for-selective engagement with the innerend 6| of the bowl locking lever 62, which is pivoted at 63 to the motor housing bowl sleeve 5|.

26, the outer operating end 64 of the lever projecting outward through a slot 65 in the base 2|, as best shown in Figs. 1 and 2. With the lever 62 in the position shown in Figs. 1 and 2 of the drawings, the bowl 48 is held against rotation.

The upper end 31a of the shaft 31 is provided with a diametrically disposed driving pin 66, and the upper end of the sleeve 21 is notched out at diametrically disposed places indicated at 61 for a purpose to be described.

The improved food grinding or chopping elements are indicated generally at 18 and include a grinder body 1| having a food hopper 12 and the extrusion portion 13 provided with the squeezer head 14 located below the top of the An auger 15 is rotatably mounted in the extrusion portion 13 for forcing food throughan extrusion die 16 into the bowl 48,

and the upper end 11 of the auger shaft is provided with a gear 18.

Cast integrally with the grinder body 1| is a sleeve portion 19 laterally offset from extrusion portion 13 and provided with bearing portions 88 in which a sleeve shaft 8| is journaled. The upper end of sleeve shaft 8| is provided with a spur gear 82 meshing with gear 18, and the lower end is provided with an internal bore 83 which telescopes over the upper end 31a of the drive shaft 31, diametrically disposed notches 84 being provided in the lower end of sleeve shaft 8| for engagement with the ends of the drive pin 66.

The lower end of the outer sleeve portions 13 is provided with diametrically opposite depending lugs 85 for being received in the notches 61 of the base housing sleeve 21, to hold the grinder body 1| against rotation, the outer diameter of sleeve portion 19 being adapted to fit within the bowl sleeve 5|. Thus when the grinder is operatively connected to the drive shaft 31 by engaging the ends of pin 66 in the notches 84, the lower end of the outer sleeve portion 19 is carried on and prevented from rotating by the upper end of sleeve 21.

The gears 18 and 82 are preferably enclosed by a cover plate 81 held in place by a thumb screw 88, which may also be utilized as a handle for positioning the grinder 18 in place on the upper end 31a of the drive shaft.

In operating the improved grinder, the bowl 48 is positioned as shown in Fig. 1 with its sleeve 5| telescoped over base housing sleeve 21, and the grinder 18 is placed with its sleeve shaft 8| telescoped over and in driving engagement with the upper end 31a of the shaft 31, whereby operation of the drive shaft by the motor shaft 38 drives the auger 15 to chop or grind food introduced in the hopper 12, and extrude the same through the squeezer head 14 into the food receiving' bowl 48. The food receiving bowl 48 may be locked by lever 62 as shown, or may be allowed to rotate as desired, while the entire load of the food grinder is carried directly on the base housing sleeve 21.

In the present improved apparatus, the grinding elements indicated generally at 18 may be quickly attached to or detached from the drive shaft above the bowl without the 'use of bolts,

screws, or other special fastening and mounting means such as adapters, supports, connectors, reduction gears and the like; and if desired, the grinding elements may be detached and other food processing elements attached and mounted in the same manner.

Due to the fact that the driving mechanism is housed in the base housing and housing sleeve.

all oil and grease necessary for lubricating'the .driving mechanism is at all times kept below the food receiving bowl, so as to render it impossible for oil or grease to dropinto or become mixed with food therein; and the center of gravity of closely adjacent to the top of the bowl. By thus providing for mounting the grinder as low as possible, the center of gravity of the device is not raised materially, and the tendency toward tipping is not increased.

The improved food grinding device is rigid,

compact and simplified in construction, and overcomes all of the difiiculties encountered with prior devices of this type. Moreover, the improved food grinding device has no cavities, crevices, pockets and the like where food particles may accidentally enter or collect to render the, device unsanitary or affect the operation of the driving or driven parts or mechanism thereof.

I claim:-

1. In a food'preparing device having a vertical drive shaft with clutch parts on the upper end thereof; a foodgrinder including a body member, having a hopper inlet, a downwardly discharging extrusion portion, a squeezer head, and a laterally offset vertical sleeve portion; a sleeve shaft journaled in said vertical sleeve portion removably telescoped over the upper end of said drive shaft and having clutch parts for releasable engagement with said drive shaft clutch parts; a grinder screw shaft in said extrusion portion; and means operatively connecting said sleeve shaft and said grinder screw shaft.

2. A food grinding device including a base housing having an upwardly extending sleeve, a drive shaftin said sleeve having driving connection means at its upper end, a downwardly discharging food grinder having a body memher and a laterally oflset sleeve portion,- and a sleeveshaft journaled in said sleeve portion and detachably telescoped over the upper end of said drive shaft for operative connection with said.

driving connection means, said grinder sleeve portion being supported on and prevented from rotation by said base housing sleeve.

8. A food grinding device including ahbase housing having anupwardly extending sleeve. a

drive shaft in said sleeve having driving connection means at its upper end, a downwardly discharging food grinder having a body member and a laterally offset sleeve portion, and a sleeve-shaft journaled in said sleeve portion and.

detachably telescoped over the upper end of said drive shaft for operative connection withsaid driving connection means, there being interengaging means on said base housing sleeve and said grinder sleeve portion for preventing rotation of the food grinder.

4. A food grinding device including a base housing having an upwardly extending sleeve, a drive shaft journaled in said sleeve and having driving connection means at its upper end, a food receiving bowl'having an upwardly extending sleeve telescoped over said housing sleeve, a food grinder having a sleeve portion, a shaft journaled in said sleeve portion and detachably telescoped over the drive shaft for operative connection with the driving connection means,

the lower end of said grinder sleeve portion being telescoped within the upper end of said bowl sleeve and supported on the upper end of said base housing sleeve.

5. A food grinding device including a base housing having an upwardly extending sleeve, 8. drive shaft journaled in said. sleeve, driving mechanism in said base housing operatively connected to said drive shaft, a food receiving bowl having an.upwardly'extending sleeve telescoped over said housing sleeve, a food grinder having a hopper inlet and an extrusion head, said food grinder being provided with a sleeve shaft telescoped within the bowl sleeve for making operative connection with the upper end of the drive shaft, said extrusion headbeing spaced below the top of saidbowl and extending into said bowl,

7 and said hopper inlet. being closely adjacent to the top of said bowl. a l

6. A food grinding device including a base housing having an upwardly extending sleeve, a drive shaft journaled in said sleeve and having driving connection means at its upper end, a food receiving bowl having an upwardly extending sleeve telescoped over said housing sleeve,

. a food grinder having a sleeve portion, 9. laterally offset extrusion head extending into said bowl below the top of said bowl sleeve, a'shaft journaled in said sleeve portion and detachably telescoped" over the drive shaft for operative connection with the driving connection means, the lower endof said grinder sleeve portion being telescoped within the upper end of said bowl sleeve and supported on the upper end of said base housing sleeve.

- EUGENE I". MARTIN. 

